Let's first simplify the given expression:

\[ 7x^2 - 9x^3 - 10x^3 - 4x^2 \]

### Step 1: Combine like terms.
Group the \(x^2\) terms together and the \(x^3\) terms together:

\[ (7x^2 - 4x^2) + (-9x^3 - 10x^3) \]

### Step 2: Simplify the terms.
- \(7x^2 - 4x^2 = 3x^2\)
- \(-9x^3 - 10x^3 = -19x^3\)

### Final simplified expression:

\[ -19x^3 + 3x^2 \]

Let me know if you'd like further details or explanations!

Here are 5 related questions to consider:
1. What happens when you factor the simplified expression?
2. How would the expression change if \(x\) were substituted with a specific value?
3. How can you represent this polynomial graphically?
4. What are the degrees of the terms in this polynomial?
5. How can you apply the distributive property to expressions like these?

**Tip:** Always group and simplify like terms before performing any further operations on polynomials.

Learn how to simplify the polynomial expression 7x² - 9x³ - 10x³ - 4x² by combining like terms. This step-by-step solution covers key algebraic concepts, such as polynomial simplification, and is suitable for students in Grades 9-10.

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